Arrows

Pretty good in general, try to exaggerate more how they get closer to the viewer by making them bigger more exponentially, and don't forget you can clarify overlaps by adding superimposed lines for lineweight

Organic forms

You got some that doesn't adhere to the simple forms we're aiming for, remember they should be 2 identical balls connected by a tube of consistent width. You got some there bulginga and some that are more stretched-ellipses like, so be careful with that. Ellipses aren't shifting their degrees too much, so try to think more about them as well. Linework is p confident and good so good job on that!

Textures

Try to focus less on contours and focus more on the cast shadows, don't outline forms. You've also done too few of them. Remember the homework for this exercises is for A4 pages, so if you work in a smaller format be sure to add the equivalent not to do less than intended.

Form intersections

You're adding a lot of lineweight here. Be more subtle with it. Only add lineweight in parts of overlaps to clarify intersections, don't add it everywhere as well. You got some divergences too so try to be more careful with them. This exercise's main objective is to mantain consistent foreshortening, and to do that it's easier with shallow foreshortening, so try to focus on it on your next attempts.

Organic intersections

Mostly 3d but there are some forms that seem like they are floating. Try to focus more on perpendicular forms, instead of paralell ones, and just like in the organic forms exercise, do only simple forms, don't go crazy with them.